Unspoken (2004)

The world outside has ceased to exist. Brandon his girlfriend Katie and his younger brother Guy have finally decided that is better to die at their own hands in the company of the ones they love than to continue living helplessly confined to a dark miniscule abandoned storefront. Before long an unhinged suicidal father and a catatonic young brother who bring out the dark truths of everyone involved join them. Can they survive each other in order to end themselves